npsm logo

Download original image
Fig. 4. Mass from the QCD sum rule Eq. (17) as a function of M. Solid(Dashed) line corresponds to mass from the QCD sum rule including contributions from OPE and instanton(from OPE only). Straight line in the middle corresponds to the value of 0.98 GeV.
New Phys.: Sae Mulli 2022;72:887~892